Washington: Today - Sunny, high in the mid 70s, low near 50. The chance of rain is near zero through tonight. Wind will be from the west at from 10 to 20 mph. Thursday - partly cloudy, high in the low 70s.

Maryland and Virginia: Today - Sunny, highs from the mid 60s to the mid 70s, lows from the 40s to the low 50s. Thursday - partly cloudy, highs from the 60s to the mid 70s.

Lower Potomac and Chesapeake Bay: Today - Fair with visibility of more than 5 miles. Wind will be from the northwest at less then 15 knots this morning, shifting to from southwest tonight. Waves in unprotected waters will be from 1 to 2 feet.

Extended Area Forecast for Friday through Sunday: Fair through the period. Highs will range from the mid 50s to near 70, lows from the 40s to the low 50s. Normal Washington temperatures for the period are a high of 67 and a low of 46.

West Virginia: Today - Sunny, highs from the mid 60s to the low 70s, lows from the upper 30s to the low 40s. Thursday - partly cloudy, highs from the mid 60s to the low 70s.

The National Weather Forecast for today - There is a chance of rain or snow from Montana and Wyoming into the Dakotas as well as in Minnesota and lowa. Rain is also possible from the lower Great Lakes into New England. Mild temperatures are forecast for New Mexico and Western texas and from central Plains through the middle Mississippi Valley in addition to the southern Atlantic Coast. Cool temperatures can be expected through much of the remainer of the country.

Almanac Data for today: Sun rises 5:37 a.m., sets 6:43 p.m.; Moon rises 9:03 a.m., sets 11:32 p.m. Tides: high 11:09 a.m. and 11:38 p.m., low 5:43 a.m. and 6:18 p.m. High and low tides at the following location may be obtained by subtracting the hours indicated from the hours above: Annapolis (3 1/4); Bloody Point Lighthouse (4 1/2); Deale, Md., (4 1/2) Colonial Beach (5 1/4); Norfolf (1); Virginia Beach (3/4); Solomons Island (6 1/4); Point Lockout (7).

The Council of Government Air Quality Index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 44 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair air quality. When the index exceeds 100 the air is considered very unhealthy and individuals with lung, heart and eye ailments, are urged to restrict their activity. The forecast for today indicates that the air quality will Improve.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 4.6 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 m'night(COLUMN)53(COLUMN)55 1 a.m.(COLUMN)52(COLUMN)59 2 a.m.(COLUMN)52(COLUMN)52 3 a.m.(COLUMN)52(COLUMN)59 4 a.m.(COLUMN)52(COLUMN)61 5 a.m.(COLUMN)52(COLUMN)61 6 a.m.(COLUMN)52(COLUMN)66 7 a.m.(COLUMN)53(COLUMN)69 8 a.m.(COLUMN)54(COLUMN)69 9 a.m.(COLUMN)56(COLUMN)67 10 a.m.(COLUMN)60(COLUMN)62 11 a.m.(COLUMN)63(COLUMN)63 12 noon(COLUMN)65(COLUMN)63 1 p.m.(COLUMN)71(COLUMN)55 2 p.m.(COLUMN)81(COLUMN)43 3 p.m.(COLUMN)85(COLUMN)36 4 p.m.(COLUMN)82(COLUMN)40 5 p.m.(COLUMN)82(COLUMN)40 6 p.m.(COLUMN)83(COLUMN)38 7 p.m.(COLUMN)68(COLUMN)59(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)56(COLUMN)38 Alburquerque(COLUMN)62(COLUMN)36 Amarillo(COLUMN)54(COLUMN)33 Anchorage(COLUMN)44(COLUMN)28 Asheville(COLUMN)83(COLUMN)66 Atlanta(COLUMN)83(COLUMN)60 Atlantic City(COLUMN)50(COLUMN)45 Austin(COLUMN)72(COLUMN)53 Baltimore(COLUMN)65(COLUMN)47 Billings(COLUMN)58(COLUMN)47 Birmingham(COLUMN)83(COLUMN)65 Bismarck(COLUMN)51(COLUMN)25 Boise(COLUMN)70(COLUMN)50 Boston(COLUMN)63(COLUMN)43 Brownsville(COLUMN)89(COLUMN)58 Buffalo(COLUMN)65(COLUMN)49 Burlington(COLUMN)45(COLUMN)33 Casper(COLUMN)44(COLUMN)33 Charleston, S.C.(COLUMN)81(COLUMN)67 Charleston, W. Va.(COLUMN)87(COLUMN)75 Charlotte(COLUMN)86(COLUMN)67 Cheyenne(COLUMN)40(COLUMN)27 Chicago(COLUMN)63(COLUMN)43 Cincinnati(COLUMN)81(COLUMN)51 Cleveland(COLUMN)83(COLUMN)62 Columbia, S.C.(COLUMN)88(COLUMN)67 Columbus, Ohio(COLUMN)80(COLUMN)62 Dal.-Ft. Worth(COLUMN)66(COLUMN)45 Dayton(COLUMN)81(COLUMN)51 Denver(COLUMN)36(COLUMN)30 DesMoines(COLUMN)57(COLUMN)37 Detroit(COLUMN)69(COLUMN)43 Duluth(COLUMN)46(COLUMN)31 El Paso(COLUMN)61(COLUMN)38 Fairbanks(COLUMN)46(COLUMN)27 Fargo(COLUMN)46(COLUMN)31 Flagstaff(COLUMN)57(COLUMN)25 Great Falls(COLUMN)66(COLUMN)52 Hartford(COLUMN)66(COLUMN)47 Helena(COLUMN)67(COLUMN)43 Honolulu(COLUMN)82(COLUMN)70 Houston(COLUMN)73(COLUMN)52 Indianapolis(COLUMN)81(COLUMN)50 Jackson, Miss.(COLUMN)77(COLUMN)56 Jacksonville(COLUMN)88(COLUMN)61 Juneau(COLUMN)44(COLUMN)35 Kansas City(COLUMN)55(COLUMN)39 Las Vegas(COLUMN)80(COLUMN)53 Little Rock(COLUMN)70(COLUMN)44 Los Angeles(COLUMN)73(COLUMN)55 Louisville(COLUMN)81(COLUMN)52 Memphis(COLUMN)77(COLUMN)49 Miami Beach(COLUMN)79(COLUMN)72 Midland-Odessa(COLUMN)55(COLUMN)34 Milwaukee(COLUMN)58(COLUMN)39 Mpls.-St. Paul(COLUMN)53(COLUMN)36 Nashville(COLUMN)81(COLUMN)54 New Orleans(COLUMN)83(COLUMN)73 New York(COLUMN)63(COLUMN)48 Norfolk(COLUMN)68(COLUMN)52 North Platte(COLUMN)50(COLUMN)24 Oklahoma City(COLUMN)64(COLUMN)38 Omaha(COLUMN)56(COLUMN)35 Orlando(COLUMN)89(COLUMN)61 Philadelphia(COLUMN)62(COLUMN)42 Phoenix(COLUMN)78(COLUMN)53 Pittsburgh(COLUMN)82(COLUMN)61 Portland, Maine(COLUMN)58(COLUMN)39 Portland, Ore.(COLUMN)74(COLUMN)40 Providence(COLUMN)56(COLUMN)43 Raleigh(COLUMN)86(COLUMN)66 Rapid City(COLUMN)53(COLUMN)26 Reno(COLUMN)75(COLUMN)36 Richmond(COLUMN)75(COLUMN)49 St. Louis(COLUMN)75(COLUMN)43 St. Prbg.-Tampa(COLUMN)85(COLUMN)69 Salt Lake City(COLUMN)62(COLUMN)44 San Antonio(COLUMN)77(COLUMN)54 San Diego(COLUMN)70(COLUMN)60 San Francisco(COLUMN)69(COLUMN)53 San Juan(COLUMN)86(COLUMN)27 St. Ste. Marie(COLUMN)34(COLUMN)32 Seattle(COLUMN)69(COLUMN)40 Shreveport(COLUMN)69(COLUMN)49 Sloux Falls(COLUMN)52(COLUMN)30 Spokane(COLUMN)65(COLUMN)38 Syracuse(COLUMN)51(COLUMN)42 Topeka(COLUMN)57(COLUMN)38 Tucson(COLUMN)69(COLUMN)45 Tulsa(COLUMN)66(COLUMN)41 Washington(COLUMN)69(COLUMN)52 Wichita(COLUMN)57(COLUMN)35(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Amsterdam(COLUMN)rain(COLUMN)1 p.m.(COLUMN)34 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)48 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)66 Berlin(COLUMN)haze(COLUMN)1 p.m.(COLUMN)54 Birmingham(COLUMN)pr. cldy(COLUMN)1 p.m.(COLUMN)39 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Cario(COLUMN)clear(COLUMN)2 p.m.(COLUMN)73 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)61 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)46 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)41 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Hong Kong(COLUMN)clear(COLUMN)3 p.m.(COLUMN)72 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)57 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)39 Madrid(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Manlla(COLUMN)clear(COLUMN)8 p.m.(COLUMN)84 Moscow(COLUMN)pt.cldy(COLUMN)3 p.m.(COLUMN)48 New Delhl(COLUMN)clear(COLUMN)5 p.m.(COLUMN)97 Nice(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)57 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)45 Paris(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)41 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)55 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Sofia(COLUMN)rain(COLUMN)2 p.m.(COLUMN)54 Stockholm(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)50 Tel Aviv(COLUMN)pt.cldy(COLUMN)2 p.m.(COLUMN)70 Tokyo(COLUMN)rain(COLUMN)9 p.m.(COLUMN)52 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN) 90(COLUMN)75 Barbados(COLUMN)cloudy(COLUMN) 86(COLUMN)75 Bermuda(COLUMN)cloudy(COLUMN) 68(COLUMN)63 Bogota(COLUMN)cloudy(COLUMN) 69(COLUMN)53 Culiacan(COLUMN)cloudy(COLUMN) 81(COLUMN)51 Edmonton(COLUMN)rain(COLUMN) 61(COLUMN)36 Havana(COLUMN)pt. cldy(COLUMN) 86(COLUMN)68 Kingston(COLUMN)pt. cldy(COLUMN) 86(COLUMN)75 Montego Bay(COLUMN)fair(COLUMN) 85(COLUMN)73 Mexico City(COLUMN)pt. cldy(COLUMN) 82(COLUMN)79 Monterrey(COLUMN)cloudy(COLUMN) 82(COLUMN)55 Montreal(COLUMN)rain(COLUMN) 37(COLUMN)34 Nassau(COLUMN)pt. cldy(COLUMN) 81(COLUMN)69 Ottawa(COLUMN)rain(COLUMN) 37(COLUMN)32 Regina(COLUMN)cloudy(COLUMN) 50(COLUMN)27 St. Kitts(COLUMN)pt. cldy(COLUMN) 50(COLUMN)27 Toronto(COLUMN)cloudy(COLUMN) 45(COLUMN)36 Vancouver(COLUMN)clear(COLUMN) 63(COLUMN)43 Veracruz(COLUMN)haze(COLUMN)100(COLUMN)73 Winnipeg(COLUMN)pt. cldy(COLUMN) 32(COLUMN)28(END TABLE)